When Irish saints brought the Word of God to the Hebrides and Scotland's Atlantic shore, these "white martyrs" sought solitude, remoteness, even harshness, in places apart from the world where they could fast, pray, and move closer to an understanding of God: places where they could see angels. In this book, Alistair Moffat searches for traces of these extraordinary men who rowed their curraghs towards danger and uncertainty in a pagan land.